OpenSSO is an open development effort
based on the source code for Sun Java System Access Manager. The
Project's
goal is to provide an extensible foundation for an identity services
infrastructure
that will facilitate single sign-on (SSO) for web applications hosted
on
web and application servers in the public domain. Additionally, OpenSSO
aims to improve developer access to this technology so that it can
become
a ubiquitous part of web security infrastructure. OpenSSO is the result
of a close collaboration between a community of developers and Sun
engineers
working to promote the evaluation, use, and innovation of identity and
access management technology.

Open Federation delivers a
federated
identity solution which extends Web Single Sign-on across corporate
boundaries.
The mission
(https://www.dev.java.net/files/documents/3676/43872/openfed-arch.pdf)
of Open Federation is to provide an open and extensible framework
for
Identity Federation and Identity Web Services that would facilitate the
deployment of interoperable customized applications.